one of the major concerns for ems in rural areas in the availability of medical units. many 911 calls are not withing the city limits of a town, they can be a number of miles out. because of the counties population, the ambulance company will sometimes only allow one ambulance in a town. in higher populated counties, 3-5 ambulances will be placed throughout the county, depending on population within the cities in the county. in the more populated areas of south alabama medical units are more availabke for emergency calls. the number of hospital transfers isnt quite as high either.